Fungi Associated With Fomes Igniarius Var. Populinus in Living Poplar Trees and Their Probable Significance in Decay

Abstract

Poplar trees with decay typical of that caused by Fomes igniarius, or with extensive stain, were dissected and several hundred platings made from each. Sixty-three different fungi were isolated, as many as 20 from a single tree. Most of the fungi were widely distributed in the tree with no consistent association with any stage of decay. Different zones of decay yielded 19 to 36 fungi each, the zone of early incipient decay giving the largest number. Bacteria were isolated from every zone.Trees with stain but no decay yielded 24 fungi, 15 of which were also found in the decayed trees. Many of these were clearly precursors of F. igniarius. Several pockets of typical decay did not yield F. igniarius, suggesting that it had been killed out by competition.The pH of water extracts of wood from various zones of decay was highly variable, the minimum range for a zone being pH 4.8 to pH 8.8, and the maximum range pH 3.8 to pH 9.4. The implications of these variations are discussed.Effects of various media, and of frozen storage prior to making isolations, were studied.

The Ecology of Fungi on Plant Remains Above the Soil

“…There is thus a succession in which bacteria, Ascomycetes and Fungi Imperfecti are followed by Hymenomycetes which are not the primary colonizers. This is also substantiated by the work of Good and Nelson (1962). They made platings from poplar trees with decay typical oi F. igniarius.…”

Heart Rot of Jack Pine in Ontario: I. The Occurrence of Basidiomycetes and Microfungi in Defective and Normal Heartwood of Living Jack Pine

“…During the past decade there has been a n increasing awareness of, and curiosity about, inicrofuilgi that inhabit the stems of living trees. These fungi have been isolated from norinal "healthy" heartwood (5,9,11,20) and, more frequently, from defective heartwood (1,4,7,10,11,16,17,21). Very little is known about the role they play in the decay process in the heartwood of living trees.…”

Fungi Associated with Dieback and Pruning Wounds of Grapevines in South Africa

“…This supports the results of Etheridge (1961), from the same vine, were sampled. Good & Nelson (1962), Shigo (1967Shigo ( , 1972, Tattar, Shortle & After incubation for 7 days at 24°C, fungal growth was Thich (1971) on succession of organisms in decay of wood examined microscopically and the fungi identified. Signifiafter wounding.…”